+ Reply to Thread
Results 1 to 10 of 15

Thread: Truck is back up and running!

Hybrid View

  1. #1
    Join Date
    Mar 2003
    Location
    San Antonio, TX
    Posts
    11,038
    Something doesn't sound right, when u say the rockers have about 40 thou play, hmmmm. The rocker tip should be flush against the valve tip, no play up and down. It'll have a little if u wiggle the tip back and forth. When a stock rocker is tightened, it touches the valve tip and pushrod then it tightens a little more;
    Compressing against the two, no lash.
    The lifters are actually preloaded, no lash. Now if Ur compressing the lifter/plunger and the lifter is bled down, there may appear to be lash.

    Check push rod length again. Remember, the lifter plunger will push down about or close to 80 thou of preload

  2. #2
    Join Date
    Feb 2009
    Location
    Wichita Falls, TX
    Posts
    405
    I asked Geoff from EPS more than twice about the pushrod length just to be safe. He said with my milled 862's i should run the 7.4's due to the EPS smaller circle base in the cams. I bought the 7.4's and ran them in my stock 862's while my other set was being finished. I never had any loud valvetrain or lifter tick etc... Now with my shaved heads it sounds loud as hell. Im sure with the raised compression and through the LT's the sound is even more magnified. But i thought valvetrain noise was due to the lack of length not too long of a PR. I may order some 7.375s and see how those will do. I figured if i had normal valvetrain noise with the 7.4's on the stock heads then i should drop the PR length the same amount that the new heads were milled.
    Alex

    02 Chevy RCSB V6 -> H/C 5.3L SOLD

    03 GMC RCSB 5.3L CAI,Tune,3/6 drop

  3. #3
    Join Date
    Mar 2003
    Location
    San Antonio, TX
    Posts
    11,038
    You're on the right path of thinking, I'm just saying, there is NO valve lash on the rockers/valves, as you tighten them, you're preloading the lifter.

+ Reply to Thread

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts